Maetin d



(l io Model.)

'- M. D. MILLER.

. I LUBRIGATOR. No. 256,807 Patented Apr. 18, 1882.

L r A. I 7 I I- I I I L"-.. I, I 1 i 1 I J l' F-E- {A 4 J .424 G I ATTORNEYS I UNITED STATES PATENT O FICE.

MARTIN I). MILLER, or SPRINGFIELD, MISSOURI, ASSIGNOR or ONE-HALF TO JOHN HECKART, JR, or SAME PLACE.

'LUBRICATOR.

SPECIFICATION forming part of Letters Patent No. 256,807, dated April 18, 1882.

.. Application filed February 21,1885. (No model.)

To all whom it may concern:

Beit known that I, MARTIN D. MILLER, a'citizen of the United States, resident at Springfield, in the county of Greene and State of Missouri, have invented a new and valuable Improvement in Lubricators and I do hereby declare that the followingis a full, clear, and exact description of the construction and opera tion of the same, reference being bad to the annexed drawing, making a part of this speci* fication, and to the letters and figures of reference marked thereon.

The figure of the drawing is a representa tion of a vertical sectional view of my oil-pump.

This invention has relation to lubricators; and it consists in the novel construction and arrangement of parts hereinafter fully described, and particularly pointed out in the claims. v

In the accompanying drawing, the letter A designates the oil-reservoir, which is usually constructed with a cap-plate, B, base 0, and cylinder-wall l), secured between the cap and base by means of bolts E. The base portion of the reservoir extends downward, as indicated at F, and is recessed from below upward to form a piston-chamber, G, and above this chamber an oil chamber or cylinder, H, of relatively small diameter, into which oil flows from the reservoir through a passage, a, and from which the oil flows through a passage, 11, which is designed to be connected to the engine by means of suitable tubes or piping. At the lower end of the extension F of the base 0 a connection is made with the steam-cylinder, near one end thereof, the cylinder being tapped for this purpose.

.Inthe chamber G is located a piston, K, having an upward extension, 0, whereby it is connected to a piston, L, of smaller diameter, which works in the oil chamber or cylinder H, said piston L forming therefore the upper end of the piston K, but being usually made of soft metal, and connected thereto as indicated in the drawing A spring, N, is located in the chamber Gr, and is designed to exert a downward pressure on the piston when the steampressure is relieved by the exhaust. Steam being admitted from the cylinder at d actuates the piston K, forcing upward. the smaller oil end or piston, L, until it passes and closes the passage av from the oil-reservoir. The oil is thus forced through the passage 1) and its conneeting-pipe to the engine. In the line of connection a check-valve of any ordinary construction is designed to be inserted, as indicated at P, the cheek-valve in this case being connected byanippleimmediatelyto thepump; out it thought advisable, a check-valve may beeonstructed in the outlet oil-passage of the pump.

Oil is fed into the reservoir at e, and the opening is provided with a cover, g, which may be pivoted on the end of one of the bolts E. Within the reservoir and near the cap is lo cated a strainer, 72, which is designed to insure that the oil in the reservoir shall be free from extraneous matter.

S indicates a regulating device controlling the upward movement of the piston, and consequently governing the oil-feed to the engine.

in the drawing, a regulating-screw is illustrated, passing through the cap-plate of the reservoir and through the base by a threaded aperture, it, into the oil-chamber. The lower end of the screw-stem is made conical or conoidal, as indicated at a, and when the screw is set by means of its handle T the point it serves as a stop, preventing the upward move ment of the piston beyond the point. As the oil piston L is made of soft metal, the tend ency of this repeated stoppage is to spread the piston, and thereby compensate for wear. A jam-nut, 1;, located on the upper portion of the regulating-screw, serves to aid in fastening it after the adjtistment has been made for the feed.

Instead of using a regulating-screw, a cam may be employed, connected to a stirrup from the piston, extending downward; but the screw is deemed preferable. Steam entering at d, as aforesaid, forces the piston upward and feeds the oil forward through the check-valve into the engine at any required point or points. When the steam is exhausting during the alternate movements of the piston in the steam cylinder, the spring N reacting forces the piston downward in the oil-cylinder to its lower position below the passage a from the oil-reservoir, so that the oil-chamber again becomes filled. In this manner the oil-forcing piston is alternately moved upward and downward, automatically feeding the oil forward to the engine. Preponderance of steam-pressure on the lower or larger piston surface, K, operates to force the oil into steam-passages, although the pressure of steam against the oil may be to the square inch as great or greater, so that the action of the pump is positive.

Having described this invention, what. I

the oil-forcing piston, made larger at its steam end than its oil end, a spring, and an adjustable regulating device, governing the play of the oil-forcing piston, substantially as specified.

3. In a lubricator, the combination, with the oil-reservoir and its communicating oil-cylinder, the steam-chamber, and the oil forcing piston, having a soft-metal oil end, of the spring, the screw regulating-stem extendinginto said oil-cylinder, and a check-valve, substantially as specified.

In testimony that Iclaim the above I have hereunto subscribed my name in the presence of two witnesses.

MARTIN D. MILLER.

Witnesses:

E. D. Orr, WV. H. BURDEN. 

